Beginning with the recent merge of pull request https://github.com/numenta/nupic/pull/3314, there is a new workflow for building nupic from sources. This change is part of our ongoing work on the nupic build system.
The main diff in the workflow is the build/install of nupic, followed by uninstall of nupic.bindings, followed by build/install of nupic.bindings (from nupic.core). Previously, you would build/install nupic.bindings first, then build/install nupic.
Note that this workflow may change/improve as we complete our transition to the new build system.